Dernieres nouvelles du SCDB
- Opening statement by Ms. Cristiana Pasca Palmer, Executive Secretary of the Convention on Biological Diversity, at the Asia-Pacific Regional Consultation Workshop on the Post-2020 Global Biodiversity Framework, Nagoya, Aichi Prefecture, Japan, 28 January 2019
- Statement of the Executive Secretary of the Convention on Biological Diversity, Dr. Cristiana Pasca Palmer, Assistant-Secretary-General of the United Nations, on the occasion of the Official Launch of the 2019 International Year of Indigenous Languages, UNESCO Headquarters, Paris, France, 28 January 2019
- It is with great regret and deepest sadness that we convey news of the untimely death of Dr Bradnee Chambers, Executive Secretary of the Convention on Migratory Species (CMS). Among his numerous achievements is the strengthened collaboration among the biodiversity-related conventions towards common objectives. His loss will be felt by each of them. He was an extraordinary advocate and champion for the environment, and a kind and wonderful human. His friends and colleagues at the Secretariat of the Convention on Biological Diversity would like to express their deepest sympathy to his family and to all staff at the CMS Secretariat.
Morphometric and genetic characterization of sympatric population of Clarias gariepinus and C. aguillaris from Senegal
|Download||Agnèse et al 1997 Clarias gariepinus et C anguillaris.pdf (French, 285 KB)|
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|1||French||Agnèse et al 1997 Clarias gariepinus et C anguillaris.pdf (current)||Célestin Mizani||05 Jan 2016||285 KB||application/pdf|
A sample of African Clarias catfishes from the Senegal River was studied using morphometry, allozyme variation, microsatellites and RFLPs of mitochondrial DNA. They all confirmed the
presence of two species, C. gariepinus and C. anguillaris. The two species were closely related genetically and no diagnostic loci were found in allozymes and microsatellites studies. Two of
the 11 haplotypes of mtDNA observed were shared by both species. Three of the four assays (morphometry, allozymes and microsatellites) allowed a precise characterization of both. One
specimen occupied an intermediate position in the analysis of the data; it was considered an F1 hybrid whose possible origin is discussed.